Restructure repository and implement secure search feature

Phase 1: Consolidate shared infrastructure
- Create shared/ directory for common code
- Consolidate Database.php from front-backend and formulaire into unified shared/Database.php
  - Smart path detection for test.db vs posterg.db
  - Secure search with wildcard escaping and input validation
  - Support both singleton and direct instantiation patterns
  - Full CRUD methods for admin functionality
- Move RateLimit.php to shared/ (30 requests/min)
- Update all require paths across apps to use shared/

Phase 2: Reorganize directory structure
- Rename front-backend/ → apps/public/
- Rename formulaire/ → apps/admin/
- Rename db/ → database/
- Update all file paths for new structure
- Create root .gitignore excluding databases, cache, logs

Implement secure search feature
- Add apps/public/search.php with full-text search across theses
- Search filters: query, year, orientation, AP program, keywords
- Security features:
  - SQL injection prevention (prepared statements)
  - Wildcard injection prevention (escape % and _)
  - Input validation (max 200 chars, year range 1900-2100)
  - Rate limiting (30 req/min per IP)
  - Pagination limited to 100 results/page
  - XSS protection (htmlspecialchars on output)

Add comprehensive test suite
- Create apps/public/tests/ with proper structure
  - tests/Integration/SearchTest.php - 12 search scenarios
  - tests/Security/SecurityTest.php - vulnerability testing
  - tests/Unit/RateLimitTest.php - rate limit behavior
- Create database/fixtures/CreateTestDatabase.php
- Add apps/public/run-tests.php test runner
- All tests passing (4/4 suites)

Update deployment configuration
- Rename justfile 'sync' recipe to 'deploy'
- Create deploy group with separate deploy-public and deploy-admin
- Add test-deploy recipe for test database
- Exclude *.db, tests/, cache/, *.md from production deploy
- Deploy shared/ to both public and admin locations

Stats: +4482 insertions, -654 deletions across 72 files

apps/public/run-tests.php

@@ -0,0 +1,85 @@
+#!/usr/bin/env php
+<?php
+/**
+ * Simple test runner
+ * Runs all tests in the tests/ directory
+ */
+
+echo "╔════════════════════════════════════════════╗\n";
+echo "║       Running Front-Backend Tests         ║\n";
+echo "╚════════════════════════════════════════════╝\n\n";
+
+$testFiles = [
+    ['name' => 'Fixtures', 'path' => __DIR__ . '/../../database/fixtures/CreateTestDatabase.php'],
+    ['name' => 'Integration', 'path' => __DIR__ . '/tests/Integration/SearchTest.php'],
+    ['name' => 'Security', 'path' => __DIR__ . '/tests/Security/SecurityTest.php'],
+    ['name' => 'Unit', 'path' => __DIR__ . '/tests/Unit/RateLimitTest.php'],
+];
+
+$totalTests = 0;
+$passedTests = 0;
+$failedTests = 0;
+
+foreach ($testFiles as $test) {
+    echo "┌─────────────────────────────────────────┐\n";
+    echo "│ Test Suite: " . str_pad($test['name'], 27) . "│\n";
+    echo "└─────────────────────────────────────────┘\n\n";
+
+    $totalTests++;
+    $path = $test['path'];
+    $file = basename($path);
+
+    if (!file_exists($path)) {
+        echo "⚠️  SKIP: $file (not found at $path)\n\n";
+        continue;
+    }
+
+    echo "Running: $file\n";
+    echo str_repeat("─", 50) . "\n";
+
+    ob_start();
+    $exitCode = 0;
+
+    try {
+        include $path;
+    } catch (Exception $e) {
+        echo "❌ ERROR: " . $e->getMessage() . "\n";
+        $exitCode = 1;
+    }
+
+    $output = ob_get_clean();
+
+    if ($exitCode === 0 && (
+        strpos($output, '❌') !== false ||
+        strpos($output, 'FAIL') !== false ||
+        strpos($output, 'Error:') !== false
+    )) {
+        $exitCode = 1;
+    }
+
+    echo $output;
+
+    if ($exitCode === 0) {
+        echo "\n✅ PASSED\n\n";
+        $passedTests++;
+    } else {
+        echo "\n❌ FAILED\n\n";
+        $failedTests++;
+    }
+}
+
+echo "╔════════════════════════════════════════════╗\n";
+echo "║              Test Summary                  ║\n";
+echo "╠════════════════════════════════════════════╣\n";
+echo "║ Total:  " . str_pad($totalTests, 35) . "║\n";
+echo "║ Passed: " . str_pad($passedTests . " ✅", 36) . "║\n";
+echo "║ Failed: " . str_pad($failedTests . ($failedTests > 0 ? " ❌" : ""), 36) . "║\n";
+echo "╚════════════════════════════════════════════╝\n\n";
+
+if ($failedTests > 0) {
+    echo "❌ Some tests failed!\n";
+    exit(1);
+} else {
+    echo "✅ All tests passed!\n";
+    exit(0);
+}